Could use an opportunistic energy load-dump like a desalination plant... Singapore had a similar situation with fresh water shortages, and had excessive waste-methane energy from Oil refineries. It eventually became a net exporter of fresh water at a profit no less. Fresh water is also easy to store off-peak hours, and distribute using existing infrastructure.

Additionally, large factory Rotary-Power-Conditioners can knock out most kinds of short-term periodic silliness on AC power lines. Some data centers use something similar with a flywheel-in-vacuum to keep things running during power fail-over to generators.

Best of luck =3